Litmus solution is a dye extracted from

Explanation

Litmus is a natural dye derived from certain types of lichen species, primarily Roccella tinctoria and other species. Lichens are a symbiotic organism composed of a fungus and an alga or cyanobacterium, and they are known for producing various colors, including the blue and red litmus dyes used in pH testing.

Final Answer

Litmus solution is a dye extracted from Lichens.